William haemal ho well



N0 ModeL) W. H. HOWELL.

' PULP GRINDER.

No. 314,844. Patented MarQBl, 1885.

ATTORNEYS.

UNITED STATES PATENT OFFICE.

WILLIAM'HARMAN HOWELL, OF THOROLD, ONTARIO, CANADA, ASSIGNOR TO WILLIAM WILKESON, OF YOUNGSTOWN, NEWV YORK.

PULP-GRINDER.

SPECIFICATION forming, part of Letters Patent No. 314,844, dated March 31, 1885.

Application filed October 9, 1884.

To all whom it may concern.-

Be it known that I, WILLIAM HARMAN HOWELL, of Thorold, in the county of \Velland, Province of Ontario, Dominion of Canada, have invented a new and Improved Pulp-Grinder, of which the following is a full, clear, and exact description.

My improvements relate to a pulp-grinding mill in which the running stone is of conical form and is surrounded by a fixed stone of corresponding shape; and the invention consists in the construction and arrangement of parts, as will be hereinafter fully described and claimed.

; 5 Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure l is a vertical section of a pulp- 2o grinder with my improvements, and Fig. 2- is a horizontal section on line at x of Fig. 1.

The conical running stone A is clamped by nuts between flanges a on spindle b, and the hollow conical bed-stone B is within a metal casing, c, that is bolted upon a circular spout,

d, that forms the middle frame of the machine, supported on legs 6. To the top of casing 0 are attached bridge-trees f, that carry the upper bearing, 9, of the spindle. The

0 lower end of the spindle rests in a step, h, that is sustained by a cross-bar, i, and. tighteningscreWs is, which are provided with hand-wheels Z, so that the step and spindle can be raised and lowered. The step It is a hollow sleeve 3 5 carrying steel disks for the spindle to bear on, and the step in turn bears on the center m, the latter bearing being at the upper part of the sleeve, so as to prevent tipping. The step is within a box, a, that is sustained by hangers o from spout d. The driving-pulley p is within the hangers 0, and is attached to the spindle by a feather-key, so as to allow end movement of the spindle through the hub of the pulley. At g, on the upper bridge-trees,

5 f, is a crossbar that limits the upward movement of the spindle.

(No model.)

The hopper r is attached on casing c. and is formed on its sides with inclined or curved flanges s, that act to force the material into the space between the upper edges of the stones.

' The runner A is madewith curved furrows t, and the stationary stone has similar furrows running in opposite directionsto furrows t.

At a is a pipe for supplying a chemical solution to the hopper.

The mill is also provided with water-supply pipes.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. A pulp-grinder consisting, essentially, of the conical running stone A, shaft b, to which said stone is clamped, the fixed stone B, surrounding the said running stone, the casing c, 6 surrounding the fixed stone, spout d, secured to the lower edge of said casing, the hangers 0, secured to the under side of spout d, crossbar t, the vertically-adjustable rods k,connecting the outer ends of the cross-bar with the 0 frame above said crossbar, steps h in the hangers 0, center m between the step and cross-bar z, pulley p on the shaft 1) within the hangers 0, the bridge-trees f, mounted on top of easing c and provided with the bearing 7 g, and cross-bar q, bearing on the upper end of shaft b to prevent vertical movement thereof, and a hopper. r, substantially as set forth.

2. The combination, with the conical running stone A and the hollow conical fixed stone surrounding the same, of the hopper 0', provided with the vertical inclined flanges 8, extending from the top to the bottom of the hopper and acting to force the material into the space between the stones, and the pipe u, for directing a stream of water between the stones to cool them, substantially as set forth.

WILLIAM HARM AN HOYVELL. 

